From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030211AbWFAPx2 (ORCPT ); Thu, 1 Jun 2006 11:53:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030212AbWFAPx2 (ORCPT ); Thu, 1 Jun 2006 11:53:28 -0400 Received: from mail1.kontent.de ([81.88.34.36]:58815 "EHLO Mail1.KONTENT.De") by vger.kernel.org with ESMTP id S1030211AbWFAPx1 (ORCPT ); Thu, 1 Jun 2006 11:53:27 -0400 From: Oliver Neukum To: "linux-os (Dick Johnson)" Subject: Re: USB devices fail unnecessarily on unpowered hubs Date: Thu, 1 Jun 2006 17:53:37 +0200 User-Agent: KMail/1.8 Cc: "Alan Stern" , "Andrew Morton" , "David Liontooth" , linux-kernel@vger.kernel.org, linux-usb-devel@lists.sourceforge.net References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200606011753.38157.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Am Donnerstag, 1. Juni 2006 17:09 schrieb linux-os (Dick Johnson): > Many, most, perhaps all such devices don't take more power when they > are "enabled". Everything is already running and sucking up maximum > current when you plug it in! If the motherboard didn't smoke when If they do, they are violating the spec. A device in the unconfigured (state 0) state must not draw more than 100mA. Regards Oliver